Prefabricated steel bridge or viaduct structure

ABSTRACT

A prefabricated steel bridge or viaduct structure, which is formed essentially of three blocks fabricated and pre-assembled in factory, and assembled together to the construction site. Once the blocks mounted thereon the concrete pillars, a surface drain for evacuating water is installed thereof to be casted therein a concrete slab and after covered from asphalt with drip slope.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to the construction of bridge or viaductstructures, and more particularly to a frefabricated steel bridge orviaduct structure.

2. Description of the Related Art

A search of prior art records has unveiled the following patents:

-   -   CA 1,292,600 issued in 1991 to Muller.    -   CA 2,376,218 registered in 2002 to Rheaume.    -   CA 2,198,986 registered in 1997 to Bester.    -   CA 2,493,141 registered in 2005 to Haldane-Wilsone.    -   U.S. Pat. No. 6,065,257 issued in 2000 to Nacey et al..    -   U.S. Pat. No. 5,870,789 issued in 1999 to Carranza-Aubry.    -   U.S. Pat. No. 5,025,522 issued in 1991 to Eskew et al..    -   U.S. Pat. No. 6,460,213 issued in 2002 to Flint et al..    -   U.S. Pat. No. 4,587,684 issued in 1986 to Miller.

SUMMARY OF THE INVENTION

In accordance with the teachings of the present invention, there isdisclosed a steel bridge or viaduct structure which is installed to theconstruction site in eight hours as opposed to the months-longconstruction periods typically associated with cast-in-place concretebridge. The steel bridge or viaduct provides an improved structureformed essentially of three blocks fabricated and pre-assembled infactory, and after carried to the construction site. Once the blocksmounted thereon the concrete pillars, a surface drain for evacuatingwater is installed thereof to be casted therein a concrete slab andafter covered from asphalt with drip slope. The foregoing and otherobjects, features, and advantages of this invention will become morereadily apparent from the following detailed description of a preferredembodiment with reference to the accompanying drawings, wherein thepreferred embodiment of the invention is shown and described, by way ofexamples. As will be realized, the invention is capable of other anddifferent embodiments, and its several details are capable ofmodifications in various obvious respects, all without departing fromthe invention.

Accordingly, the drawings and description are to be regarded asillustrative in nature, and not as restrictive.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings show illustrative embodiment of the presentinvention from which the features and advantages will be readilyapparent.

FIG. 1 is an elevation view of the prefabricated bridge incorporatingthe principles of the invention.

FIG. 2 is a view showing a block of the bridge structure.

FIG. 3 is a view showing two blocks of the bridge structure.

FIG. 4 is an isometric view of the prefabricated bridge incorporatingthe principles of the invention.

FIG. 5 is a cut view of the prefabricated bridge incorporating theprinciples of the invention.

FIG. 6 is a view showing the three blocks disassembled.

FIG. 7 is an enlarged view of the prefabricated bridge incorporating theprinciples of the invention.

DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENT

According to the embodiment of the present invention, as depicted inFIGS. 1 to 7, it is shown the steel bridge or viaduct structure which isformed essentially of three blocks fabricated and pre-assembled infactory, and assembled together to the construction site by means ofjoints (4) and bolts (11). Each block is formed of diaphragms (3)assembled to angle iron (14) welded to beams (8,9) sliding on pieces (7)fixed thereon the concrete pillars (6). The beams (8) are welded toparapet (5) assembled to guardrail (1). Once the blocks mounted thereonthe concrete pillars (6), a surface drain (10) for evacuating water isinstalled thereof to be casted therein a concrete slab (2) and aftercovered from asphalt (12) with drip slope (13).

Each block weighs approximately sixty tons and is five feet height,three feet width, and a hundred fifteen feet length. For the two-trackroads it is necessary to install several blocks in the middle so as toobtain the desired width.

This new concept would particularly advantageous in the constructionon-site of mega interchange which is be very complicated and extremelydangerous for the safety of workers on the construction site and thedrivers circulating on the roads.

Although only a single embodiment of the present invention has beendescribed and illustrated, the present invention is not limited to thefeatures of this embodiment, but includes all variations andmodifications within the scope of claims.

1. A steel bridge or viaduct structure which is formed essentially of three blocks fabricated and pre-assembled in factory, and assembled together to the construction site by means of joints and bolts, wherein each block includes diaphragms assembled to angle iron welded to beams sliding on pieces fixed thereon the concrete pillars, wherein the beams are welded to parapet assembled to guardrail, and once the blocks mounted thereon the concrete pillars a surface drain for evacuating water is installed thereof to be casted therein a concrete slab and after covered from asphalt with drip slope. 